iOS 5.1 beta 3 appears on developer iPhone, available only OTA?

It's been a while since the last beta, but per a screenshot sent in by a tipster, Apple's already begun pushing iOS 5.1 beta 3 to development iOS devices. The 77.4MB update curiously isn't live on Apple's developer website just yet (see update), but when it lands we'll hopefully gleam more than "bug fixes and improvements."